Q:

The reactivity of an atom arises from

A) the existence of unpaired electrons in the valence shell	B) the energy differences between the electron shells
C) the sum of the potential energies of all the electron shells	D) the average distance of the outermost electron shell from the nucleus

Answer & Explanation Answer: A) the existence of unpaired electrons in the valence shell

Explanation:

When atoms react they do so in order to reach the lowest energy, which is the most stable. The electrons orbitals will overlap in the way that reduces the energy the most. Orbitals of similar energy will produce the greatest stabilisation.The answer you gave isn't the whole story, it depends what species is reacting with what. The effective nuclear charge on the atom will affect the energy of the valance electrons.

Hence, the reactivity of an atom arises from the existence of unpaired electrons in the valence shell.

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams , GATE
Job Role: Analyst , Bank Clerk

4 7395

Q:

Who is the author of the book 'WE INDIANS'

A) Khushwant Singh	B) Mulk Raj Anand
C) Nirad C. Chaudhary	D) Subramanya Swamy

Answer & Explanation Answer: A) Khushwant Singh

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Books and Authors

12 7394

Q:

The Essar group of companies has been promoted by _____

A) Ambanis	B) Kanorias
C) Ruias	D) Goenkas

Answer & Explanation Answer: C) Ruias

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: General Awareness
Exam Prep: Bank Exams , CAT

18 7393

Q:

Which of the following does not contain the material particles

A) alpha - rays	B) beta - rays
C) gamma - rays	D) anode rays

Answer & Explanation Answer: C) gamma - rays

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry

16 7391

Q:

Syadvad is a doctrine of

A) Lokayatism	B) Saivism
C) Jainism	D) Vaishnavism

Answer & Explanation Answer: C) Jainism

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Indian History

7 7382

Q:

Vitamins are

A) Macro Nutrients	B) Micro nutrients
C) Essential Amino acids	D) Non essential Amino acids

Answer & Explanation Answer: B) Micro nutrients

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Biology

29 7381

Q:

Which of the following is the Trophy / Cups associated with the game of Hockey?

A) Derby	B) Agha Khan Cup
C) Merdeka	D) Vizzy Trophy

Answer & Explanation Answer: B) Agha Khan Cup

Explanation:

Report Error

View Answer Report Error Discuss

Filed Under: Sports

22 7370

Q:

Ravi, Rohan and Rajesh alone can complete a work in 10, 12 and 15 days respectively. In how many days can the work be completed, if all three work together?

A) 4 days	B) 5 days
C) 3 days	D) 8 days

Questions

Quick Links